Photopheresis

**Definition:** A process in which peripheral blood is exposed in an extracorporeal flow system to photoactivated 8-methoxypsoralen (METHOXSALEN) and ultraviolet light - a procedure known as PUVA THERAPY. Photopheresis is at present a standard therapy for advanced cutaneous T-cell lymphoma; it shows promise in the treatment of autoimmune diseases.

**Tree numbers:** - E02.774.945.500.500 - E04.292.762

**Synonyms:** - Extracorporeal Photochemotherapy - Photochemotherapy, Extracorporeal - Extracorporeal Photopheresis